Unplugging a pump and pipelines with hot water
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Published by SALUSSafe Work Procedure: Unplugging a Pump and Pipelines with Hot Water
Document Number: [SWP-NUMBER] Revision Date: [DATE] Next Review Date: [NEXT REVIEW DATE] Department: [DEPARTMENT NAME]
1. Scope
This procedure covers the safe unplugging of pumps and pipelines using hot water. It applies to maintenance and cleaning operations where blockages in pipelines need to be cleared using hot water. This procedure is applicable in environments where pressurized systems are used and where there is a risk of exposure to hot water and steam.
This procedure should be used in conjunction with the company's lockout/tagout procedures and any other relevant safety protocols.
2. Definitions
Lockout/Tagout (LOTO) A safety procedure used to ensure that machines are properly shut off and not able to be started up again prior to the completion of maintenance or repair work.
Pressurized System A system that operates under pressure, such as pipelines or vessels containing fluids or gases.
Hot Water Unplugging The process of using hot water to clear blockages in pipelines.
3. Responsibilities
3.1 Supervisors
- Ensure all workers are trained in this procedure.
- Verify that all safety equipment and PPE are available and in good condition.
- Conduct regular safety audits to ensure compliance with this procedure.
3.2 Workers
- Follow the safe work procedure as outlined.
- Use all required PPE and safety equipment.
- Report any unsafe conditions or incidents to the supervisor immediately.
3.3 Health and Safety Representative
- Monitor compliance with safety procedures.
- Provide feedback and recommendations for improving safety practices.
4. Potential Hazards and Risks
| Hazard | Risk | Control Measures |
|---|---|---|
| Hot water and steam | Burns and scalds | Use appropriate PPE, including gloves and face shields [1] |
| Pressurized systems | Sudden release of pressure causing injury | Ensure systems are depressurized before maintenance [1] |
| Electrical equipment | Electric shock | Follow lockout/tagout procedures [2] |
5. Personal Protective Equipment (PPE)
Proper PPE is essential to protect against burns, scalds, and other injuries.
- Heat-resistant gloves - Protect hands from hot surfaces and water.
- Face shield - Protect face from splashes of hot water.
- Safety goggles - Protect eyes from steam and hot water.
- Protective clothing - Long sleeves and pants to protect skin from hot water.
- Safety boots - Non-slip and heat-resistant to protect feet.
Inspect PPE before use and replace any damaged items.
6. Equipment and Tools
Using the correct equipment and tools is crucial for safety and efficiency.
- Pressure relief valves - Ensure they are functioning to prevent overpressure.
- Hot water hoses - Rated for high temperatures and pressures.
- Lockout/tagout devices - For securing energy sources.
- Thermometers - To monitor water temperature.
- Pressure gauges - To monitor system pressure.
Inspect equipment regularly and maintain according to manufacturer guidelines.
7. Pre-Job Requirements
7.1 Training and Competency
Workers must be trained in lockout/tagout procedures and the use of PPE.
7.2 Pre-Job Briefing
Discuss the procedure, potential hazards, and emergency response actions with all team members.
7.3 Work Area Preparation
Ensure the area is clear of unnecessary personnel and equipment. Set up barriers and warning signs.
8. Safe Work Procedure Steps
Step 1: Preparation
Ensure all necessary equipment and PPE are available and in good condition.
- Verify that the system is depressurized.
- Confirm that lockout/tagout procedures are in place.
- Check that all safety devices are operational.
Step 2: Unplugging
Carefully introduce hot water into the system to clear blockages.
- Gradually increase water temperature and pressure.
- Monitor pressure gauges to avoid overpressure.
- Use thermometers to ensure water temperature is within safe limits.
Step 3: Completion
Once the blockage is cleared, safely shut down the system.
- Depressurize the system completely.
- Remove lockout/tagout devices following proper procedures.
- Conduct a final inspection to ensure the system is safe for operation.
9. Precautions and Safety Measures
- Monitor Pressure - Continuously monitor system pressure to prevent overpressure.
- Temperature Control - Ensure water temperature does not exceed safe limits.
- Communication - Maintain clear communication with all team members.
- Emergency Preparedness - Be prepared to respond to any emergencies.
- Regular Inspections - Conduct regular inspections of equipment and PPE.
10. Emergency Procedures
10.1 General Emergency Response
In case of an emergency, immediately stop all work and follow emergency protocols.
10.2 Specific Emergency Scenarios
- Burns or Scalds - Cool the affected area with water and seek medical attention.
- Pressure Release - Evacuate the area and notify emergency services.
- Electrical Shock - Disconnect power and provide first aid if safe to do so.
10.3 Emergency Contact Information
[List of emergency contacts and their phone numbers]
11. Incident Reporting and Investigation
Report all incidents, near-misses, and hazards to the supervisor immediately. Follow the company's incident investigation procedures to determine root causes and implement corrective actions.
12. References and Related Documents
Approved by: [NAME AND POSITION] Date: [APPROVAL DATE]
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Sources used for this answer
[1] Occupational Safety and Health Standards (OSHA 29 CFR 1910)
Page 115
Open source documentSource excerpt
## 29 CFR 1910 (OSHA) - (A) Work on cord and plug connected electric equipment for which exposure to the hazards of unexpected energization or start up of the equipment is controlled by the unplugging of the equipment from the energy source and by the plug being under the exclusive control of the employee performing the servicing or maintenance. - (B) Hot tap operations involving transmission and distribution systems for substances such as gas, steam, water or petroleum products when they are performed on pressurized pipelines, provided that the employer demonstrates that ( 1 ) continuity of service is essential; ( 2 ) shutdown of the system is impractical; and ( 3 ) documented procedures are followed, and special equipment is used which will provide proven effective protection for employees. - (3) Purpose. (i) This section requires employers to establish a program and utilize procedures for affixing appropriate lockout devices or tagout devices to energy isolating devices, and to otherwise disable machines or equipment to prevent unexpected energization, start-up or release of stored energy in order to prevent injury to employees. - (ii) When other standards in this part require the use of lockout or tagout, they shall be used and supplemented by the procedural and training requirements of this section. ## (b) Definitions applicable to this section. - Affected employee. An employee whose job requires him/her to operate or use a machine or equipment on which servicing or maintenance is being performed under lockout or tagout, or whose job requires him/her to work in an area in which such servicing or maintenance is being performed. Authorized employee. A person who locks out or tags out machines or equipment in order to perform servicing or maintenance on that machine or equipment. An affected employee becomes an authorized employee when that employee's duties include performing servicing or maintenance covered under this section. Capable of being locked out. A…
[2] CAT 345 GC Excavator Operation and Maintenance Manual
Page 27
Open source documentSource excerpt
Unless you are instructed otherwise, perform maintenance with the equipment in the servicing position. Refer to Operation and Maintenance Manual for the procedure for placing the equipment in the servicing position. When you perform maintenance above ground level, use appropriate devices such as ladders or man lift machines. If equipped, use the machine anchorage points and use approved fall arrest harnesses and lanyards. ## Pressurized Air and Water Pressurized air and/or water can cause debris and/or hot water to be blown out. The debris and/or hot water could result in personal injury. When pressurized air and/or pressurized water is used for cleaning, wear protective clothing, protective shoes, and eye protection. Eye protection includes goggles or a protective face shield. The maximum air pressure for cleaning purposes must be reduced to 205 kPa (30 psi) when the nozzle is deadheaded and the nozzle is used with an effective chip deflector and personal protective equipment. The maximum water pressure for cleaning purposes must be below 275 kPa (40 psi). Avoid direct spraying of water on electrical connectors, connections, and components. When using air for cleaning, allow the machine to cool to reduce the possibility of fine debris igniting when redeposited on hot surfaces. ## Trapped Pressure Pressure can be trapped in a hydraulic system. Releasing trapped pressure can cause sudden machine movement or attachment movement. Use caution if you disconnect hydraulic lines or fittings. High-pressure oil that is released can cause a hose to whip. High-pressure oil that is released can cause oil to spray. Fluid penetration can cause serious injury and possible death. ## Fluid Penetration Pressure can be trapped in the hydraulic circuit long after the machine has been stopped. The pressure can cause hydraulic fluid or items such as pipe plugs to escape rapidly if the pressure is not relieved correctly. Do not remove any hydraulic components or parts until pre…
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